あなたのdllはマルチコアを活かせるdllですか？

「PythonはC++よりどれくらい遅いのか」ということを気にするOpenCVユーザーは、使っているDLLやcv2.pydのビルドの中身を気にしよう。マルチコアのCPUを使っているのに、使っているdllの中身がそれを活かせないdllになっていることはありませんか？



```cpp:buildIno.cpp
#include <opencv2/core/core.hpp>
#include <iostream>

int main(int argc, const char* argv[])
{
  // ビルド情報を表示する
  std::cout << cv::getBuildInformation() << std::endl;

  return 0;
}
```

```txt:CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
add_executable(buildInfo buildInfo.cpp)

find_package(OpenCV REQUIRED)

if(OpenCV_FOUND)
  include_directories(${OpenCV_INCLUDE_DIRS})

  target_link_libraries(buildInfo ${OpenCV_LIBS})
endif(OpenCV_FOUND)
```

参考
[CMakeLists.txt から始めよう] http://qiita.com/nonbiri15/items/c77c046f0e10f8140cfe


Pythonの使用しているcv2.pydの条件は
次のようにしてわかります。
\>\>\> import cv2
\>\>\> print cv2.getBuildInformation()

General configuration for OpenCV 2.4.11 =====================================

  Platform:
    Host:                        Windows 6.2 AMD64
    CMake:                       3.1.1
    CMake generator:             Visual Studio 9 2008
    CMake build tool:            C:/Program Files (x86)/Microsoft Visual Studio 9.0/Common7/IDE/devenv.com
    MSVC:                        1500

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                C:/Program Files (x86)/Microsoft Visual Studio 9.0/VC/bin/cl.exe  (ver 15.0.30729.1)
    C++ flags (Release):         /DWIN32 /D_WINDOWS /W4 /GR /EHa  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /wd4251 /MD /O2 /Ob2 /D NDEBUG  /Zi
    C++ flags (Debug):           /DWIN32 /D_WINDOWS /W4 /GR /EHa  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /wd4251 /D_DEBUG /MDd /Zi /Ob0 /Od /RTC1 
    C Compiler:                  C:/Program Files (x86)/Microsoft Visual Studio 9.0/VC/bin/cl.exe
    C flags (Release):           /DWIN32 /D_WINDOWS /W3  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /MD /O2 /Ob2 /D NDEBUG  /Zi
    C flags (Debug):             /DWIN32 /D_WINDOWS /W3  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /D_DEBUG /MDd /Zi /Ob0 /Od /RTC1 
    Linker flags (Release):      /machine:X86  /INCREMENTAL:NO  /debug
    Linker flags (Debug):        /machine:X86  /debug /INCREMENTAL:YES 
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda java viz

  Windows RT support:            NO

  GUI: 
    QT:                          NO
    Win32 UI:                    YES
    OpenGL support:              YES (glu32 opengl32)
    VTK support:                 NO

  Media I/O: 
    ZLib:                        build (ver 1.2.7)
    JPEG:                        build (ver 62)
    PNG:                         build (ver 1.5.12)
    TIFF:                        build (ver 42 - 4.0.2)
    JPEG 2000:                   build (ver 1.900.1)
    OpenEXR:                     build (ver 1.7.1)

  Video I/O:
    Video for Windows:           YES
    DC1394 1.x:                  NO
    DC1394 2.x:                  NO
    FFMPEG:                      YES (prebuilt binaries)
      codec:                     YES (ver 55.18.102)
      format:                    YES (ver 55.12.100)
      util:                      YES (ver 52.38.100)
      swscale:                   YES (ver 2.3.100)
      gentoo-style:              YES
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    DirectShow:                  YES
    Media Foundation:            NO
    XIMEA:                       NO
    Intel PerC:                  NO

  Other third-party libraries:
    Use IPP:                     8.1.1 [8.1.1]
         at:                     C:/Program Files (x86)/intel/Composer XE/ipp
    Use Eigen:                   NO
    Use TBB:                     YES (ver 4.2 interface 7005)
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Include path:                D:/Build/OpenCV/opencv-2.4.11/3rdparty/include/opencl/1.2
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 X:/Python27/python.exe (ver 2.7.9)
    Libraries:                   X:/Python27/libs/python27.lib (ver 2.7.9+)
    numpy:                       X:/Python27/lib/site-packages/numpy/core/include (ver 1.8.2)
    packages path:               X:/Python27/Lib/site-packages

  Java:
    ant:                         NO
    JNI:                         X:/Java18/include X:/Java18/include/win32 X:/Java18/include
    Java tests:                  NO

  Documentation:
    Build Documentation:         NO
    Sphinx:                      NO
    PdfLaTeX compiler:           NO
    Doxygen:                     NO

  Tests and samples:
    Tests:                       YES
    Performance tests:           YES
    C/C++ Examples:              NO

  Install path:                  D:/Build/OpenCV/OpenCV-2.4.11-vc9-x32/install

  cvconfig.h is in:              D:/Build/OpenCV/OpenCV-2.4.11-vc9-x32
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